Main Functions and Applications of Industrial Gas-to-Gas Heat Exchangers

An industrial gas-to-gas heat exchanger transfers heat from one gas (usually high-temperature flue gas) to another, lower-temperature gas. Its primary purpose is to recover waste heat from the flue gas, improve energy efficiency, and reduce energy costs. It transfers heat energy from the high-temperature gas to the low-temperature gas through heat exchange between the two gases, thus reusing the heat.

Operating Principle

An industrial gas-to-gas heat exchanger uses heat conduction and convection to transfer heat from the high-temperature gas to the low-temperature gas. The high-temperature gas passes through one side of the heat exchanger, transferring heat to the heat exchanger's surface, where it is then transferred to the low-temperature gas.

Main Functions and Applications

Energy Saving and Consumption Reduction: Recovers waste heat generated during industrial production, reducing energy waste.

Efficiency Improvement: Recovered heat energy is used in other processes, improving overall production efficiency.

Cost Reduction: Reduces operating costs by reducing the need for external energy sources.

Applications

In industrial production, it is commonly used to recover waste heat from high-temperature gases such as boilers, kilns, and industrial waste gases. The recovered heat can be used to preheat the air entering industrial equipment or for heating systems.

Heat Exchanger Types

Industrial air-to-air heat exchangers can be categorized into various types based on their structure, including:

Plate-fin heat exchangers: These utilize numerous thin, flat metal plates as heat exchange surfaces, enabling efficient heat transfer.

Tube-and-tube heat exchangers: These are the more common type, immersing a bundle of tubes in the gas and utilizing the inner and outer tube surfaces for heat exchange.